Signal Connections For 4-Wire Jtag Communication - Texas Instruments MSP430 User Manual

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J1 (see Note A)
J2 (see Note A)
VCC TOOL
2
VCC TARGET
4
6
TEST/VPP
8
10
12
14
A Make either connection J1 in case a local target power supply is used or connection J2 to power target from the
debug/programming adapter.
B The RST/NMI pin R1/C1 configuration is device family dependent. See the respective MSP430 family user's guide for
the recommended configuration.
C The TEST pin is available only on MSP430 family members with multiplexed JTAG pins. See the device-specific data
sheet to determine if this pin is available.
D The connection to the JTAG connector RST pin is optional when using 4-wire JTAG communication mode
capable-only devices and not required for device programming or debugging. However, this connection is required
when using 2-wire JTAG communication mode capable devices in 4-wire JTAG mode.
E When using 2-wire JTAG communication capable devices in 4-wire JTAG mode, the upper limit for C1 should not
exceed 2.2 nF. This applies to both TI FET interface modules (LPT/USB FET).
Figure 2-1. Signal Connections for 4-Wire JTAG Communication
SLAU278F – May 2009 – Revised December 2010
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V
CC
R1
47 k
W
(see Note B)
JTAG
TDO/TDI
1
TDI/VPP
3
TMS
5
TCK
7
GND
9
RST (see Note D)
11
13
C1
10 nF/2.2 nF
(see Notes B and E)
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Signal Connections for In-System Programming and Debugging
V /AV /DV
C3
C2
0.1 µF
10 µF
RST/NMI
TDO/TDI
TDI/VPP
TMS
TCK
TEST/VPP (see Note C)
V /AV /DV
Design Considerations for In-Circuit Programming
CC CC CC
MSP430Fxxx
SS SS SS
25